Tianhe-2 (China)

China's new Tianhe-2 supercomputer officially became the fastest supercomputer in the world on Monday by blowing America's Titan supercomputer out of the water.

A group of computer scientists and engineers who twice a year release the "Top500" list of fastest supercomputers measured the Tianhe-2 at 33.9 petaflops (quadrillions of calculations per second). That's nearly twice as fast as the Titan, which was relegated to the second spot on the list.

Also dubbed Milkyway-2, Tianhe-2 came online two years before expected. It was manufactured by China's National University of Defense Technology and will be relocated to the National Supercomputer Center in Guangzho in southwest China by the end of this year.